Software Architect's Handbook

Advantages of layered architectures

There are some key benefits to using a layered architecture. This pattern reduces complexity by achieving a Separation of Concerns (SoC). Each layer is independent and you can understand it on its own without the other layers. Complexity can be abstracted away in a layered application, allowing us to deal with more complex problems.

Dependencies between layers can be minimized in a layered architecture, which further reduces complexity. For example, the presentation layer does not need to depend directly on the data layer and the business layer does not depend on the presentation layer. Minimizing dependencies also allows you to substitute implementations for a particular layer without affecting the other ...